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    Question

    A can complete a piece of work in 24 days. He worked for

    21 days and then B finished the remaining work in 6 days. In how many days can A and B finish the work together?
    A 12days Correct Answer Incorrect Answer
    B 15days Correct Answer Incorrect Answer
    C 16days Correct Answer Incorrect Answer
    D 18days Correct Answer Incorrect Answer

    Solution

    A can complete a piece of work in 24 days. A does the work in 24 days =1 A does the work in 1 day =1/24 A does the work in 21 days = (1/24) ×21=7/8 Remaining work =1-7/8 =1/8 Remaining work finished by B in 6 days =6×8=48days. A and B together finish the work – 2448 96 42 =96/4+2 =96/6 =16 days.

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